单选题
On the basis of their observations, scientists
A、
make more observations.
B、
develop hypothesis and theories.
C、
reveal their observations to the public.
D、
challenge their colleagues.
【正确答案】
C
【答案解析】
[解析]向大众公布，文章虽没有直接提到，但可以从文章推测。故应选C。
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